Pressure Valve
SKU: Stihl | ST-4255 500 7403
- Regular price
- £23.02 Ex VAT
- £27.62 Inc VAT
- RRP: £26.33 Ex VAT
- Sale price
- £23.02 £23.02 Ex VAT
- Regular price
-
- £27.62 £27.62 Inc VAT
Free Delivery Over £75 *
Worldwide Shipping from the UK
Trusted UK Arborist Retailer
30-Day Easy Returns
Product information & specifications
STIHL Pressure Valve (1.0 / 1.5 / 2.0 Bar) – For Constant Pressure Spraying
The STIHL Pressure Valve is designed to maintain a constant spraying pressure, ensuring consistent application and professional results when working with low-throughput nozzles. Ideal for spreading weedkiller and other treatments, the valve helps reduce variations in flow rate by regulating pressure with a deviation of only ±10%.
Available in 1.0 bar, 1.5 bar and 2.0 bar versions, each valve delivers stable output even as tank pressure changes, making it ideal for achieving uniform coverage across lawns, beds, pathways and large treatment areas.
Key Features
- Maintains constant spraying pressure for smooth, even application
- Available in 1.0 bar, 1.5 bar and 2.0 bar pressure versions
- Essential when working with low-throughput nozzles
- Reduces variation in applied liquid for more consistent results
- Ideal for weedkillers, herbicides and liquid treatments
- Suitable for both domestic and professional spraying tasks
Usage Guidance
Choose the correct bar rating based on the required pressure for your nozzle type and application. For best results, pair with STIHL fine or fan jet nozzles as recommended in your sprayer’s user manual.
Specifications
| Product | STIHL Pressure Valve (Constant Pressure) |
| Available Pressure Ratings | 1.0 bar, 1.5 bar, 2.0 bar |
| Pressure Stability | Deviation of ±10% |
| Benefits | Ensures consistent application with reduced variation in flow |
| Compatible Sprayers | STIHL SG 31, SG 51, SG 71, SGA 30, SGA 85 |
FAQs
What does the STIHL Pressure Valve do?
It keeps the spraying pressure constant, which ensures an even and reliable application of chemicals, especially when using low-throughput nozzles.
Which pressure ratings are available?
The valve is available in 1.0 bar, 1.5 bar and 2.0 bar versions.
Which STIHL sprayers is this valve compatible with?
It is suitable for STIHL SG 31, SG 51, SG 71, SGA 30 and SGA 85 sprayers.
Why is constant pressure important?
Constant pressure improves application quality by reducing variation in volume, helping deliver more consistent coverage and better treatment performance.
Is this valve helpful for weedkiller application?
Yes. It is especially useful when spreading weedkiller, ensuring steady flow and preventing under- or over-application.
STIHL Pressure Valve (1.0 / 1.5 / 2.0 Bar) – For Constant Pressure Spraying
The STIHL Pressure Valve is designed to maintain a constant spraying pressure, ensuring consistent application and professional results when working with low-throughput nozzles. Ideal for spreading weedkiller and other treatments, the valve helps reduce variations in flow rate by regulating pressure with a deviation of only ±10%.
Available in 1.0 bar, 1.5 bar and 2.0 bar versions, each valve delivers stable output even as tank pressure changes, making it ideal for achieving uniform coverage across lawns, beds, pathways and large treatment areas.
Key Features
- Maintains constant spraying pressure for smooth, even application
- Available in 1.0 bar, 1.5 bar and 2.0 bar pressure versions
- Essential when working with low-throughput nozzles
- Reduces variation in applied liquid for more consistent results
- Ideal for weedkillers, herbicides and liquid treatments
- Suitable for both domestic and professional spraying tasks
Usage Guidance
Choose the correct bar rating based on the required pressure for your nozzle type and application. For best results, pair with STIHL fine or fan jet nozzles as recommended in your sprayer’s user manual.
Specifications
| Product | STIHL Pressure Valve (Constant Pressure) |
| Available Pressure Ratings | 1.0 bar, 1.5 bar, 2.0 bar |
| Pressure Stability | Deviation of ±10% |
| Benefits | Ensures consistent application with reduced variation in flow |
| Compatible Sprayers | STIHL SG 31, SG 51, SG 71, SGA 30, SGA 85 |
FAQs
What does the STIHL Pressure Valve do?
It keeps the spraying pressure constant, which ensures an even and reliable application of chemicals, especially when using low-throughput nozzles.
Which pressure ratings are available?
The valve is available in 1.0 bar, 1.5 bar and 2.0 bar versions.
Which STIHL sprayers is this valve compatible with?
It is suitable for STIHL SG 31, SG 51, SG 71, SGA 30 and SGA 85 sprayers.
Why is constant pressure important?
Constant pressure improves application quality by reducing variation in volume, helping deliver more consistent coverage and better treatment performance.
Is this valve helpful for weedkiller application?
Yes. It is especially useful when spreading weedkiller, ensuring steady flow and preventing under- or over-application.
Delivery & Returns
UK Delivery
Fast, reliable delivery from our UK warehouse.
- FREE UK Standard Delivery
applies to eligible UK orders over £75 ex VAT.
Estimated delivery: 2–4 working days
- UK Standard Delivery from £3.60 + VAT
Estimated delivery: 2–4 working days
- Next Working Day Delivery – £6.00 + VAT
Order before 3:00pm (Monday–Friday) for next working day delivery
All UK orders are dispatched Monday–Friday and sent via a tracked courier service.
International Delivery
We ship worldwide from the UK.
- Europe from £10.00
Estimated delivery: 2–7 working days - Rest of the World from £12.00
Estimated delivery: 2–11 working days
Shipping costs and delivery times are calculated at checkout based on destination and order contents.
Customs, Duties & Taxes
International orders may be subject to local import duties, taxes, or customs charges.
When UPS is selected at checkout, applicable duties and taxes are included in the total price. For other shipping services, duties and taxes may be charged separately on delivery and are the responsibility of the recipient.
Customs processing times may affect delivery estimates.
Returns
30-Day Return Policy
- Items can be returned within 30 days of delivery
- Products must be unused and in original condition
- Return postage costs apply unless the item is faulty or incorrect
For full details, please visit our Shipping & Returns page.
UK Delivery
Fast, reliable delivery from our UK warehouse.
- FREE UK Standard Delivery
applies to eligible UK orders over £75 ex VAT.
Estimated delivery: 2–4 working days
- UK Standard Delivery from £3.60 + VAT
Estimated delivery: 2–4 working days
- Next Working Day Delivery – £6.00 + VAT
Order before 3:00pm (Monday–Friday) for next working day delivery
All UK orders are dispatched Monday–Friday and sent via a tracked courier service.
International Delivery
We ship worldwide from the UK.
- Europe from £10.00
Estimated delivery: 2–7 working days - Rest of the World from £12.00
Estimated delivery: 2–11 working days
Shipping costs and delivery times are calculated at checkout based on destination and order contents.
Customs, Duties & Taxes
International orders may be subject to local import duties, taxes, or customs charges.
When UPS is selected at checkout, applicable duties and taxes are included in the total price. For other shipping services, duties and taxes may be charged separately on delivery and are the responsibility of the recipient.
Customs processing times may affect delivery estimates.
Returns
30-Day Return Policy
- Items can be returned within 30 days of delivery
- Products must be unused and in original condition
- Return postage costs apply unless the item is faulty or incorrect
For full details, please visit our Shipping & Returns page.